For real estate agent Bob Egan, it's all about preserving history:
Manhattan is constantly being torn down and rebuilt anew, and I'm trying to find these places while they are still around.
That's why he scours the streets of New York City to find the precise locations that album cover photos were made. The cover of Bob Dylan's iconic 1965 album Highway 61 Revisited was shot at 4 Gramercy Park West. Egan didn't just do a simple Google search to find that information, but engaged in careful detective work. You can read his research stories at the link.
Link -via Flavorwire